APA (7th ed.) Citation

Middleton, W. (1938). A sawfly injurious to young pines (Rev. June 1938.). U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Middleton, William. A Sawfly Injurious to Young Pines. Rev. June 1938. Washington, D.C.: U.S. Dept. of Agriculture, 1938.

MLA (9th ed.) Citation

Middleton, William. A Sawfly Injurious to Young Pines. Rev. June 1938. U.S. Dept. of Agriculture, 1938.